TOHATSU MFS 8B Service Manual page 150

8. Loosen bolts in reverse order in several steps. Remove crank
case and measure width of crushed plasti-gauge on each main
journal. Replace bearing if the width is over specified value.
Crankshaft Main Journal Oil Clearance :
0.012 - 0.044 mm (0.00047 - 0.00173 in)
Functional Limit :
0.060 mm (0.00236 in)
If the clearance is less than specified value,
check that inner diameter code is as shown
below.
Cylinder is marked on its upper section with inner diameter
code that indicates inner diameter of each bearing holder.
There are the following two types of bearings that are
indicated with the inner diameter code, which is to be used
for identification of proper size part.
Inner diameter code
A or X
B or Y
Inner diameter codes A and B or X and Y
represent size of each bearing section.
Remarks When cylinder/crank case is purchased as a part,
fitting bearing comes with it.
Bearing is painted with color
There are the following two types of bearings that are to be
selected properly.
[Coloring (Inner Diameter Code)]
Brown
Black
5-46
Standard value Coloring of bearing
33.000 - 33.008 mm
(1.2992 - 1.2995 in)
33.008 - 33.016mm
(1.2995 - 1.2998 in)
that represents thickness.
Thickness
1.488 - 1.494 mm
(0.05858 - 0.05882 in)
1.494 - 1.500 mm
(0.05882 - 0.05906 in)
Brown
Inner diameter code
Black
4st 8/9.8 2016